P. Suàrez, B. Jùnior, and M. de Barros. TAMODIA '04: Proceedings of the 3rd Annual Conference on Task Models and Diagrams, Prague, Czech Republic, page 113-120. (2004)
D. Reichart, A. Dittmar, P. Forbrig, and M. Wurdel. Interactive Systems: Design, Specification, and Verification, 15th International Workshop, DSV-IS 2008, Kingston, Canada, (2008)
F. Jourde, Y. Laurillau, A. Moran, and L. Nigay. Interactive Systems: Design, Specification, and Verification, 15th International Workshop, DSV-IS 2008, Kingston, Canada, page 281-286. (2008)